Excavator.



T. H. WALKER.

EXGAVATOR.

APPLICATION FILED SEPT.3,1908.

Patented Mar. 23, 1909.

HHIVMI arxa/z a wm 7 W l UNITED STATES PATENT oFFroE.

THOMAS H. WALKER, OF MISSOULA, MONTANA.

EXCAVATOR To all whom it may concern:

Be it known that I, Tnorms H. IVALKER, a citizen of the United States, residing at Missotla, in the cornty of ldisso. la and State 5 of Montana, have invented certain new and useful Improvements in Excavators: and I do declare the following to ho a full, clear, and exact description of the invention, s2. ch as will enable others skilled in the art to which it appertains to make and the same. a

This invention relates to excavators of the type known as scrapers and adapted to be operated by draft .annnals or machine power, and particularly comprehends certain im )rovements on my Patent No. 813,393 issued eb. 20th, 1906.

One of the objects of my present invention is the construction of an excavator machine of the type described in my previous patent provided with a spiral conveyer mounted within a cylinder.

Another object of the invention is the production of a frame for supporting a cylinder provided with a s iral conveyor and connected to a draft ar or tongi e in such a manner that said bar or tongue may be reversed on said frame.

Another object of the invention is the production of simpler adjl. sting means for raising and lowering the plow described in my previous atent.

With t e foregoing and other objects in view, the invention consists of certain novel features of constriction, combination and arran ement of parts, as will be more f1. 11yartictlarly pointed ()Ltin descri ed and the ap ended c aims.

In t e accompanying drawings, Figure 1 is a plan View of my im roved excavator machine; Fig. 2 is aside e evation thereof; Fig. 3 is a transverse section.

Corresponding and similar parts are indicated in all the views of the drawings and in the following description by similar reference characters.

In the drawings, the numeral 1 designates a frame which is preferably formed oval in shape and straightened at 2 and 3. A U- shaped support 4 is rigidly secured to the frame 1 by means of rivets which are arranged to extend through the ends of said U- sha ed iece and through said frame. The

-mi dle ody portion of this piece 4 extends in an are beyond the straight portion 3 of the frame 1 an is adapted 'to support apcraper Specification of Letters Patent.

Application filed September 3, 1908.

Patented March 23, 1909.

Serial No. 451,532.

plow 5. 'l he scraper plow 5 is carried by the approximately U shaped frame 6 which extends throtgh tubular guides 7 formed at the ends of a cross rod 7 rigidlysupported beneath the support 4. The frame 6 raised or lowered by vertically disposed o erating screws 8 and 9, respectively, w ich pass ElII'O'i' lI the 'rpper cross piece of said frame... T. he screws 8 and 9 are provided at their ipper ends with gear or sprocket. wheels 10 and 11, which are connected by means of the chain 12. V. hen it is desired to adj st the plow 5, the same may be accomplished by moving one of the sprocket wheels and thereby rotating the operating extend above the frame 1 and the U-shaped support and are crossed at their central point. At this point a tongue 17 lormcd with an upwardly arched end 18 18 secured pivotally to the braces 15 and 16 by a pivot- 19. l'he tongue or draft bar 17 may be swung in the arc of a circle around the frame 1 and for this purpose is provided with a projecting piece 20 which is arranged to engage the under side of the frame 1.

When it is desired to excavate a quantity of earth for a road, the draft bar or tongue 17 is placed in its forward position and the cylinder 13 is rotated over the ground.

'2 he movement of the cylinder 13 over the ground will cause the plow 5 to scrape quantities of earth against the open end oi. the cylinder 13 and the earth passing into said, cylinder will be conveyed interiorly thereof by means of the s iral conveyer.

14. When the cylinder is ill ed with earth, the tongue 17 may be reversed on the frame 1 and the cylinder rotated in an. opposite direction. The movement of the cylinder over the ground when the tongue is held in its reversed )ositionon the frame 1, will cause the spiral conveyor 14 to convey the dirt contained within the cylinder 13 outwardly-against the scraper plow 5 and on tions and arrangements of parts without departing from the spirit of the invention.

arious changes'in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention, as defined in the ap pended claims.

I claim as my invention 1. An excavating machine comprising a main frame, a horizontal support projecting laterally from one end .of said frame, a conveyer cylinder having an open end, rotatably mounted in said frame, a spiral con veyer arranged in said cylinder and a scraper plow adjustably supported near the open end of the conveyer cylinderin an oblique position with relation to the longitudinal axis thereof.

2. An excavating machine comprising a main frame, a horizontal sup ort projecting laterally from one end of sai frame, a conveyer cylinder having an open end rotatably mounted in said frame, a spiral conveyer arranged in said cylinder and a scraper plow adjustablysu ported near the open end of the conveyer cy inder in an oblique position with relation to the longitudinal axis thereof and a reversible draft bar or tongue pivotedto the center of the main frame.

3. An excavating machine comprising a main frame having curved front and rear portions, a conveyer cylinder rotatably mounted in said frame, ,a spiral conveyer in the cylinder, bowed intersecting braces extending over and across the frame and attached'at opposite ends thereto and a re versible tongue pivoted to said braces at the point of intersection thereof.

4. An excavatmg machine comprising a 'main frame having curved front and rear portions, a conveyer cylinder rotatably mounted in'sald frame, a splral conveyer in "the cylinder, bowed intersecting braces ere tending over and across the frame and attached at opposite ends thereto and a reversible tank pivoted to said braces at the point of intersection thereof, said tank having a guide or projection adapted to extend under either the front or rear curved portion of the main frame.

5. An excavating machine comprising a main frame having curved front and rear portions, a cylinder rotatably mounted in said frame, a conveyer in said cylinder, a brace extending laterally from one end of the main frame, bowed intersecting braces extending above and across said frame with their ends attached thereto, a tongue having an arched end pivoted to said braces at the point of intersection thereof, and a scraper plow adjustably mounted near one end of the conveyer cylinder.

6. In combination, a main frame, a con veyer cyhnder-rotatably mounted therein,

a scraper plow, a spiral conveyer in said cylinder, a frame for supporting the scraper plow on the main frame and means for adjusting the plow supporting frame vertically. I

7. In combination, a main frame, a conveyer cylinder rotatably mounted therein, a scraper plow, a supporting frame therefor, vertical screws for adjusting the plow supporting frame-vertically, sprockets arranged at-the upper, ends of said screws and a chain for connecting the sprockets.

8. In combination, a main frame, a conveyer cylinder having an open end mounted therein, an approximately U-shaped plow supporting frame adjustably supported on the main frame adjacent to the open end of the conveyer cylinder, a scraper plow attached to the plow supporting frame, vertical adjusting screws passing through the cross piece of the plow supporting frame, sprockets arranged at the upper ends of said screws and a chain for connecting said sprockets.

I In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

THOMAS H. WALKER. Vfitnesses:

E. L. ZEIGLER, E. G. ELLIS. 

